JPS57177074A - Magnetic coating material for magnetic recording medium and its preparation - Google Patents

Magnetic coating material for magnetic recording medium and its preparation

Info

Publication number
JPS57177074A
JPS57177074A JP6139281A JP6139281A JPS57177074A JP S57177074 A JPS57177074 A JP S57177074A JP 6139281 A JP6139281 A JP 6139281A JP 6139281 A JP6139281 A JP 6139281A JP S57177074 A JPS57177074 A JP S57177074A
Authority
JP
Japan
Prior art keywords
coating material
magnetic
lecithin
recording medium
magnetic coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6139281A
Other languages
Japanese (ja)
Inventor
Mitsuo Yaegashi
Toshihiko Oguchi
Akio Ishizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6139281A priority Critical patent/JPS57177074A/en
Publication of JPS57177074A publication Critical patent/JPS57177074A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: A magnetic coating material, prepared by incorporating lecithin and a cationic surfactant as a dispersing agent in a ferromagnetic powder and a resin binder, having little flocculates and stable dispersion state, and capable of giving a magnetic recording medium having improved record reproduction characteristics.
CONSTITUTION: Lecithin, preferably soybean oil lecithin, is adsorbed in ferromagnetic powder, preferably γ-Fe2O3 or Fe3O4 containing Co, and a cationic surfactant, preferably an amine salt, is then adsorbed thereon, and then mixed and dispersed in a resin binder, preferably vinyl chloride-vinyl acetate copolymer, to give the aimed magnetic coating material.
USE: A high-density recording for audio, video or computers.
COPYRIGHT: (C)1982,JPO&Japio
JP6139281A 1981-04-24 1981-04-24 Magnetic coating material for magnetic recording medium and its preparation Pending JPS57177074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6139281A JPS57177074A (en) 1981-04-24 1981-04-24 Magnetic coating material for magnetic recording medium and its preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6139281A JPS57177074A (en) 1981-04-24 1981-04-24 Magnetic coating material for magnetic recording medium and its preparation

Publications (1)

Publication Number Publication Date
JPS57177074A true JPS57177074A (en) 1982-10-30

Family

ID=13169839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6139281A Pending JPS57177074A (en) 1981-04-24 1981-04-24 Magnetic coating material for magnetic recording medium and its preparation

Country Status (1)

Country Link
JP (1) JPS57177074A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61274737A (en) * 1985-05-21 1986-12-04 フエロフルイデイクス・コ−ポレイシヨン Stable ferro-fluid composition and its production and use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61274737A (en) * 1985-05-21 1986-12-04 フエロフルイデイクス・コ−ポレイシヨン Stable ferro-fluid composition and its production and use

Similar Documents

Publication Publication Date Title
JPS57154618A (en) Magnetic recording medium
GB1430675A (en) Magnetic recording medium incorporating fine acicular iron-based particles
GB1430676A (en) Magnetizable particles
JPS56145525A (en) Magnetic recording medium
US4239637A (en) Magnetic material for recording media
JPS58139337A (en) Magnetic recording medium
GB1100610A (en) Magnetic recording medium and method of making same
JPS57177074A (en) Magnetic coating material for magnetic recording medium and its preparation
US4364988A (en) Magnetic recording medium
EP0075870B1 (en) Magnetic recording medium
JPS57179943A (en) High-density magnetic recording medium
EP0367159A3 (en) Magnetic recording medium comprising acicular alloy magnetic powder
JPS5629840A (en) Magnetic recording medium
JPS5819735A (en) Magnetic recording medium
JPH0252414B2 (en)
JPS63183614A (en) Magnetic recording medium
JPS5693123A (en) Magnetic recording material
JPS6224852B2 (en)
JPS6356607B2 (en)
JPS60157720A (en) Magnetic recording medium
JPS54103005A (en) Magnetic disc coating composite
JPS55129933A (en) Magnetic recording medium
JPS57143732A (en) Magnetic recording medium
JPS6196518A (en) Magnetic recording medium
JPS6194226A (en) Magnetic recording medium